ISD-300A1 Cypress Semiconductor Corp, ISD-300A1 Datasheet - Page 15

• Manufacturer Part Number: ISD-300A1
• Description: IC USB 2.0 BRIDGE BULK 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of ISD-300A1

• Applications: USB 2.0 to ATA/ATAPI Bridge
• Interface: ATA, ATAPI
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 100-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1459

October 19, 2001
Address
0x5
0x6
0x7
USB Bus Mode
ATAPI Command
Block Size
Master/Slave Selection
ATAPI Reset
ATA_NATAPI
Force USB FS
VS / MSC
SOFT_RESET
DISK_READY Polarity
ATA Command
Designator (Byte 0,
LSB)
ATA Command
Designator (Byte 1,
MSB)
Field Name
Bit (7) – read only.
USB bus mode of operation
0
1
Bit (6)
CBW Command Block Size.
0
1
Bit (5)
Device number selection. This bit is valid only when “Skip ATA/ATAPI
Device Initialization” is active. Under ISD-300A1 control (“Skip
ATA/ATAPI Device Initialization = ‘0’), the value is ignored.
0
1
Bit (4)
ATAPI reset during drive initialization.
Setting this bit enables the ATAPI reset algorithm in the drive initialization
state machines
Bit (3) – read only.
Indicates if an ATA or ATAPI device is detected
0
1
Bit(2)
Force USB full speed only operation.
Setting this bit prevents the ISD-300A1 from negotiating HS operation during
USB reset events
0
1
Bit(1)
Vendor Specific / MSC SOFT_RESET control.
0
1
Bit (0)
DISK_READY active polarity. DISK_READY Polarity is ignored if
I_MODE is set to 1. During I_MODE operation DISK_READY polarity is
active high.
0
1
Value in CBW CB field that designates if the CB is decoded as vendor
specific ATA commands instead of the ATAPI command block.
Value in CBW CB field that designates if the CB is decoded as vendor
specific ATA commands instead of the ATAPI command block.
Active high polarity
USB bus is operating in full speed mode (12 Mbit/sec).
USB bus is operating in high speed mode (480 Mbit/sec).
12 byte ATAPI CB
16 byte ATAPI CB
Drive 0 (master)
Drive 1 (slave)
Normal operation – allow HS negotiation during USB reset
USB FS only – do not allow HS negotiation during USB reset
Vendor Specific USB command utilized for SOFT_RESET
Mass Storage Class USB command utilized for SOFT_RESET
Active low polarity
ATAPI device
ATA device or possible device initialization failure.
10
Description
ISD-300A1
ROM Defaults
On-board
0x00
0x24
0x24